HardLabs

SWR Bridge

SatcomRadio·SWR_Bridge·Kicad/SWRBridge.kicad_pcb

SWR Bridge PCB layout, top view — open source board by SatcomRadio

About the SWR Bridge PCB

SWR Bridge is an open source PCB design by SatcomRadio, published on GitHub under the MIT license. It is a 2-layer board measuring 85 × 45 mm, with 16 components from 7 distinct parts.

By type, the board carries 6 resistors, 4 capacitors and 2 diodes.

It belongs with the test & measurement designs in this gallery.

From the project

SWR Bridge

This repo consists of a board for measuring SWR. It works up to 500mhz and 1kW of power in HF. The pickup lines are 20 db attenuated.

You can connect it to an arduino and measure the FWD and reflected power.

The potentiometers allow to calibrate the maximum power seen at the FWD and REF ports so you can get more resolution at higher or lower RF power levels.

Keep the 2 potentiometers at the same resistance value

SWR Bridge, from the project README
From the project README

SWR Bridge bill of materials (BOM)

16 components, 7 distinct parts.

QtyPartRefs
2
Conn_01x02_Socket
FWD1, REF1
2
10k
RV1, RV2
2
1N5711W-7-F
D1, D2
4
100n
C1, C2, C3, C4
2
50
R1, R2
2
10k
R3, R5
2
1k
R4, R6

SWR Bridge design files

The KiCad project lives in the SatcomRadio/SWR_Bridge repository on GitHub; these links point at the commit this page was built from.

SWR Bridge: common questions

How big is the SWR Bridge PCB?

The SWR Bridge measures 85 × 45 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the SWR Bridge?

16 components, from 7 distinct parts. The full bill of materials is listed on this page.

Where can I download the SWR Bridge design files?

From the SatcomRadio/SWR_Bridge repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the SWR Bridge design in my own project?

Yes, under the terms of its MIT license, which SatcomRadio chose for the repository.

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